AD Quality Auto 360p 720p 1080p Top articles1/5READ MOREWalnut’s Malik Khouzam voted Southern California Boys Athlete of the Week “Today’s settlement is proof that the cooperative actions of federal and state government and the private industry can have a positive impact on our citizens and the environment,” said Acting Assistant Attorney General Kelly A. Johnson for the Justice Department’s Environment and Natural Resources Division. Most of the corporations deemed responsible for the pollution already have agreed to pay about $100 million to clean up the water, Burgess said. But Wednesday’s agreement involved several companies that had refused to chip in for cleanup costs, she said. Using money from the companies, the WQA so far has installed three treatment plants to pump up and clean polluted water. And a fourth plant is under construction. The 16 companies are: Aerojet-General Corp.; Allegiance Healthcare Corp.; Azusa Land Reclamation Co. Inc.; Fairchild Holding Corp.; Hartwell Corp.; Huffy Corp.; Leach International Corp.; Lockheed Martin Corp.; Mobil Oil Corp.; Oil & Solvent Process Co.; Phaostron Instrument and Electronic Co.; Philip Morris USA Inc.; Reichhold Inc.; the Valspar Corp.; White & White Properties; and Winco Enterprises Inc. Company officials were not immediately available for comment. — Ben Baeder can be reached at (626) 962-8811, Ext. 2703, or by e-mail at [email protected] local news?Sign up for the Localist and stay informed Something went wrong. Please try again.subscribeCongratulations! You’re all set! Sixteen firms have agreed to pay $14.9 million to reimburse federal and state agencies for investigating and helping clean up a plume of polluted groundwater beneath Baldwin Park, authorities announced Wednesday. “This pays them for office work, investigations, legal costs and other work they have been doing on this project,” said Grace Burgess, executive director of the San Gabriel Valley Water Quality Authority. “Some of the work they have done dates back to the 1980s, so this is a big step for them.” The 1-mile-wide, 8-mile-long plume was first discovered in 1979. The groundwater is polluted with rocket fuel, dry cleaning chemicals and components of industrial solvents, according to the U.S. Environmental Protection Agency. Some chemicals in the plume are at concentration levels 7,500 times what is allowed by federal and state health guidelines, according to the EPA.